Lock.



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WILLIAM SEYMOUR JENKINS, OF LICKING, MISSOURI, ASSIGNOR TO WILLIAM R. CARSON AND LOUIS E. HUMRICHOUSE, OF COLUMBIA CITY, INDIANA.

LOCK.

SPECIFICATION forming part 0f Letters Patent No. 668,188, dated February 19, 1901.

Application lsd April 16, 1900. Serial No. 13 ,092. tNo model.)

To all whom t may concern:

Be it known that LWILLIAM SEYMOUR JEN- KINS, a citizen of the UnitedStates, residing at Licking, in the county of Texas and State of Missouri, have invented a new and useful Lock, of which the following is a specification.

The invention relates to improvements in locks.

The object of the present invention is to improve the construction of door-locks and to provide asimple, inexpensive, and efficient one adapted to be operated by a key and capable of also being operated by a locking-lever from the inner face of the door to obviate the necessity of using a key and to prevent the bolt from being retracted from the exterior of the door.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is an elevation of the lock, one of the ,removable plates of the casing being detached and the main bolt being retracted. Fig. 2 is a similar view illustrating the position of the parts when the main bolt'is extended by the bolt-operating lever. Fig. 3 is a vertical sectional View on line 3 3 of Fig. 2. Fig. A is a detail perspective view of the main bolt. Fig. 5 is a detail perspective view of the latch-operating device or lever. Fig. 6 is a detail View of a portion of the main bolt.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

1 designates a mortise-lock provided with a casing 2 of the ordinary construction, having a removable plate 3 and designed to be mounted Within a mortise of a door, but the improvements are equally applicable to facelocks. Within the upper portion of the casing is arranged a spring-actuated knob-latch 4t, which is operated by the spindle of a knob, and the said spindle carries a hub 5 of the ordinary construction. The hub 5 is provided with a pair of oppositely-disposed arms 6, adapted to engage lugs 7 of a yoke portion 8 of the knob-latch in the usual manner.

The spring for actuating the knob-latch may be of any desired construction and may be arranged in any suitable manner. The spring 9 of the accompanying drawings is substantially L-shaped, one arm being mounted on the casing and the other arm being free and engaging the head of the knob-latch.

Within the lower portion of the casing is arranged a sliding main or locking bolt 11, having an enlarged head 12, which is adapted to be extended through an opening of the casing to engage a suitable keeper. The head 12 of the bolt is connected by a shank portion 13 with an enlarged rear portion 14, which is extended above and below the shank 13 and which is provided with an oblong boss 15, adapted to be engaged by spring-actuated tumblers 16. The casing is provided with a keyhole 17, and the enlarged portion of the bolt is provided with a rectangular opening 18, adapted to receive the key and permitting the same to contact with and lift the tumblers out of engagement with the boss 15, as hereinafter explained; but when the bolt is extended by the latch-lever the solid portion of the enlargement 14E is carried opposite the keyhole, as illustrated in Fig. 2 of the drawings, and covers the same, whereby the bolt is adapted to operate as a guard and is capable of preventing an instrument from being introduced into the keyhole for the purpose of picking the lock from the exterior.

The tumblers, which may be of any nurnber, are pivoted at their frontends at 19, and each is provided with a spring 20, secured at its lower end to the tumbler at the lower edge thereof and extending upward and bearing against a lug 21 of the casing, whereby the spring is adapted to throw the rear portion ofthe tumbler downward. The rear portion of the tumbler is provided with an opening to receive the boss 15 and is substantially U-shaped, its upper side 22 resting upon the upper edge ot' the boss 15, as clearly illustrated in Figs. 1 and 2 of the accompanying drawings. The upperside 22 of each tumbler is provided with notches formed by projecting lugs 23 and 24 and adapted to receive an upper lug 25 of the boss 15. When the bolt is retracted, as illustrated in Fig. l of the accompanying drawings, the upper lug IOO 25 is arranged in the recess at the end of the upper side 22 of the U-shaped portion ot' each tumbler, and when the bolt is operated by a key the lug 25 is received between the lugs 23 and 24, and the solid rear portion of the bolt does not cover the keyhole, and the bolt is thereby prevented from being accidentally moved outward over the said keyhole. The boss is provided with a lower lug 26, which is adapted to engage a shoulder 27 of the lower side of the U-shaped portion ot' each tumbler should the said tumblers be raised when the key is withdrawn from the lock after moving the bolt outward. This will prevent the lock from being picked when the keyhole is not covered by the solid portion of the bolt and when the latter is partially extended. The

upper lugs 23 and 24 also prevent the bolt from being moved in either direction after it has been partially extended by the key and thelatter has been Withdrawn from the casing.

The bottom of the enlarged rear portion of the bolt is provided with a recess 28 and is adapted to be engaged by an arm 29 of a lever 30, consisting of a hub mounted on a suitable spindle 31, which is provided at the inner face of the door with a thumb-piece 32. The recess 28 is provided at opposite sides with curved edges, and the front portion 33 forms a seat or stop to limit the downward movement of the arm of the lever 30, wherebythe b'olt is securely retained in its extended position. The arm of the leveris also adapted to engage and lift the tumblers to release the bolt. By this construction the'main or lookin g bolt also serves the purpose of a latchbolt, and the operating device or lever not only serves to retain the bolt in its extended position, but it is adapted to actuate the same 'and obviates the necessity of using the key when locking and latching the door rfrom the inner face of the same.

The lever 30 is provided at the inner end of the swinging arm with a hollow hub having annular bosses at its ends extending outward to the outer surfaces of the lock-casing, and the spindle 3l of the thumb-piece may be introduced endwise into the hub of the lever 30 from either side of the lock-casing, as the lock is disposed to the right or left or otherwise. The hollow hub is also provided in one end with'a key seat or slot 3l, adapted to receive a lug of the spindle. The lug will be arranged at the inner face of an escutcheon-plate, which will retain the spindle and the thumb-piece in place. d

It will be seen that the lock is exceedingly simple and inexpensive in construction, that the enlarged rear portion of the bolt is adapted to form a keyhole-guard when the bolt is operated by the lever from the interior of the door, and that the bolt-operating lever or device not only operates the bolt and the tumblers, but also locks the bolt in its extended position.

What is claimed isl. In a lock, the combination of a casing to engage the same, a tumbler adapted to be engaged by the key and the arm and .means carried by the bolt for covering the keyhole when the said bolt is projected by the arm, substantially as described.

2. In a lock, the combination of a casing having a keyhole, a sliding bolt having an opening arranged adjacent to the keyhole and provided in rear of the opening with'a solid portion adapted to cover the keyhole, said bolt being adapted to be operated by a key, tumblers engaging the bolt, and a movable arm located beneath the tumblers and arranged to engage the same and the bolt and adapted to actuate the latter and lock the same in its extended position, substantially as described.

3. In a lock, the combination of a casing having a keyhole, a sliding bolt provided with an opening located adjacent to the keyhole, said bolt being provided in rear of the opening with a solid portion adapted to cover the keyhole, tumblers provided with openings located at the keyhole, and a movable device located beneath the tumblers and arranged to engage the same and actuate the bolt, substantially as described. 4

4. In a lock, the combination of a sliding bolt having an opening designed to be located adjacent to the keyhole of a casing, said bolt being provided in rear of the opening with a solid portion and having a boss formed on the same, lugs arranged at the top and bottom of the boss, tumblers having upper and lower sides `located above and below the boss and provided with means for engaging the said lugs, and a movable device located beneath the tumblers and arranged to engage the same and the bolt, substantially as described. Y

5. In a lock, the combination of a casing having a keyhole, the sliding bolt having an enlarged rear portion provided with an opening and having a lower recess forming front IOC IIC

and rear walls or edges, tumblers provided with openings, and having upper and lower portions for engaging the bolt, the upper p0rtions being located adjacent to the keyhole and adapted to be engaged by a key and a movable arm mounted within the casing and operating in the recess at the bottom of the' ISO per and lower portions located adjacent to In testimony that I claim the foregoing as the keyhole and the recess, the upper portion my own I have hereto affixed my signature in being adapted to' be engaged by the key, and the presence of tWo Witnesses.

a permanently-mol'lnted arm operating in the WILLIAM SEYMOUR JENKINS. recess of the bolt and arranged to engage the Witnesses: lower portion of the tumbler, substantially as W. H. MACKMAHAN,

described. BEN RIKE. 

